Site Agent in London

Talented people are the key to our success. Would you like to work for an inclusive and collaborative company which is also one of the most successful within the UK infrastructure industry? We are looking for a Site Agent with experience in managing HV substation construction works (civils, structures, plant, cabling, or M&E). This is to support the delivery of a range of schemes including the major £70m+ Trawsfynydd Substation project. This is an excellent opportunity for someone to work on the long-term Electricity Transmission Partnership in the North West. The role will be site‑based for the 2–3‑year construction phase, supporting multi‑disciplinary design, procurement, construction, and commissioning activities from early works through installation, testing, and handover.

Role Responsibilities

• Lead the safe and efficient delivery of construction works at Trawsfynydd Substation, ensuring activities are completed to programme, budget and required standards.
• Manage day‑to‑day site operations, including supervision of subcontractors and direct labour.
• Coordinate construction activities in line with approved programmes, method statements, drawings, specifications, and technical standards.
• Provide strong leadership on health, safety, and environmental performance, always promoting a safe working environment.
• Ensure compliance with CDM Regulations, site rules, company HSEQ procedures, and implement RAMS and work permits effectively.
• Proactively manage site risks, interfaces, constraints, and environmental impacts throughout the project lifecycle.
• Maintain high standards of construction quality, managing inspections, test plans, quality documentation and closing out defects/non‑conformances.
• Consult effectively with the Project Manager, engineering, planning and commercial teams, providing accurate progress updates, forecasts, and reports.
• Attend and lead site meetings, toolbox talks, coordination sessions, and support client inspections, audits, and site visits.
• Manage site logistics, welfare, access and temporary works, ensuring materials, plant and resources meet programme requirements.
• Coordinate interfaces with adjacent works, outages, and operational constraints.
• Control project costs, ensuring adherence to budgets and efficient use of resources.
• Collaborate effectively with a high‑performing team and demonstrate ambition in delivering complex engineering challenges.

Skills, Experience And Qualifications

• Proven experience as a Site Manager on large infrastructure and/or substation projects.
• Experience working on similar power infrastructure or civil engineering schemes at Agent or Sub Agent level.
• Strong experience in EHV cable installation within substations (advantageous).
• Background in managing construction projects from planning through to delivery.
• Demonstrable experience managing subcontractors and multi‑disciplinary site teams.
• Strong project management capabilities.
• Commercial awareness and cost control proficiency.
• Effective team coordination and planning skills.
• Excellent problem‑solving abilities.
• Strong working knowledge of health and safety legislation, including CDM Regulations, and thorough understanding of H&S compliance.
• Ability to read and interpret construction drawings, specifications, and programmes.
• Knowledge of quality assurance processes.
• Excellent leadership, communication, and organisational skills.
• Experience working under NEC or similar forms of contract.

What is in it for you?

• Generous holiday entitlement with the option to buy five days.
• Flexible and adaptable working.
• Family friendly policies and work/life approach.
• Mentoring programmes and continuous learning support.
• Contributory pension scheme.
• Annual bonus scheme.
• Recognition scheme and long service awards.
• Car scheme and Private Medical Insurance (if applicable to role).
• We also provide the option to participate in our share‑save scheme; discounts including cycle to work and gym membership; a support and advice service for colleagues and their families, and more.

About The Energy Business Unit

We have extensive experience in upgrading and replacing energy networks, delivering asset management for major UK energy companies and network operators. Our transmission and distribution services involve the upgrading and replacement of electricity assets both above and below ground. Within the electricity sector we install and maintain assets, including excavation, laying, and jointing of cables, (fluid filled and XLPe), substations and overhead line, new build, repair, and refurbishment services. We have an exciting opportunity for you to join our team where you will have the opportunity to progress in your career. We are looking for people who share our passion on delivering great customer service whilst also being able to work within an enjoyable and hardworking team environment. Talented people are the key to our success, so if this sounds like you, apply now.